Tracking device.



-To all 'whom t may concern.'

STATES rafrnnroniuoa.

Louis W. soU'rHGATE, or Woncnsrnn, massiioiiusn'iims, assieivon To 'riem Auro` PNEUMATIG AGTIEON COMPANY, ACORPORA-TIQN NEW YORK TRACKING nevica.

Specication of I ietters Patent.

Patenti-.alinea 7,1915.

Application ined march 1s, i912, seriai No. 634,487. Renewed-May 12,1915. serial no. 28,772.

-Be it known that I, LOUIS W. SoUTnG'A'in,

a citizen of the United States, residing at I Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Tracking Device, 'of which the following is a specification.

' The object of-this invention is to provide la new and improved apparatus for'causing a perforated note-sheet to run correctly with relation to a tracker. The device has been primarily designed for use in connection with -automatic musical instruments..-

The invention is shown in the accompanying' drawing forming part of this application for patent in which,

Figure 1 is a front elevationpartly in section of the mechanism, and Fig. 2 is a plan View partly in diagram. v

Referring to the drawing and in detail, Adesignates the spool box which has arranged therein, the usual journals 10 and 11 on which a music spool B carrying the perforated note-sheet C can be placed in the usual manner. The left-hand journal 10 i'ts in a casing 12 which carries' the usual spring 13 tending to press the journal 10 outwardly.

D designates the tracker arranged in the spool box', and E the usual take-up spool which is actuated to draw the note-sheet for- .ward over the tracker bar. Arranged in the Vback of the spool' box are blocks 14--1-1.

Spring arms 15-15 are secured to these blocks and projectthrough holes 16-1'6 cut in the tracker. These arms 'are made' of flexible metal and are bent so that they will just clear the edges of the note-sheet when the same is in proper lateral position on the tracker. Contact arms 17-17 are alsosecured to the blocks 14-.14't'o coperate with.

the spring arms 15 to yform lelectrical contacts to control the electro-magnetic mechanism hereinafter described. This electromagnetic mechanism consists of two electro- 'magnets F and F connected to a source of magnet F connects by a wire 21 to the rightposition on lthe tracker, it will not close through the wire 21 and'magnet F.

Thev magnets are .arranged to control pivoted keepers or armatures G-G which carry valves H-.H which cover control openings I-I arranged appurtenant to the tracker, and which control openings yregutus.' This pneumatic' apparatus consists of two pneumatics J andJ arranged ona base K and connected to operate together by an arm or link 23." .Each pneumatic is con-A trolled by a double val've 24 operated byl a diaphragm., 25. The control.' openings are a passageway27 which is connectedto the vacuum inducing apparatus of the instrument. The right-hand pneumatic J is, connected by link 28, bell-crank 29, link 30, arm 31, shaft 32, arm-33, link 34, arm 35.*

shaft 36 and cam .37 to operate the left-hand journal 11.

In operation, if the l'note-sheet for illuslate the operation of the pneumatic apparaj .connected by pipes 26 under said dia- 'phragms The diaphragms are arranged in tration, wanders to thel left, the circuit4 through wire QO'and magnet lF will be closed.

This magnet will lift the valve H, from the control opening I, and will allow air topass under the-right-hand diaphragm, which will lift the right-,hand valve 24- and allow air to flow into pneumatic J. When this oper- "ation takes place, the journal 11 will be allowed to move to the right and the spring 12 acting on' the journal v10, will force the music spool slightly to the right to correctthel lef-thand wandering of ythe note-sheet. When thecoirection -is made, the electrical contact' `1s broken and the apparatus ceases operation.

If the note-sheet wanders too far to the right, the circuitv is completed through the lefth'and magnet F and the left-hand pneumatic J will move the journal 11 slightly to the left and` adjust the note-sheet automatically back to proper tracking' position.

' The spring arms 15-15 and the contact arms 17-17 are preferably made out of flexible metal so they can be bent and adjusted to get a very delicate operation of the apparatus. A

Having thus fully described my invention,

Patent is l. In an automatic tracking device for a perforated note-sheet, the combination of the tracker, a spring arm projecting through the tracker, a. contact 'for the Spring arm, electromagnetic means connected to said Vcontact and spring arm, and pneumatic means for adjusting the lateral relation between the note-sheet and tracker controlled by the electro-magnetic means.

2. In an automatic Vtracking device for a perforated note-sheet, the combination y of the tracker, two vspring arms eX ending through the tracker and arranged to project so that the perforated note-sheetcan run between the same, contacts coperating with said spring arms, electro-magnetic means controlled by said' contacts, and a pneumatic apparatus controlled by said electro-magnetic means for adjusting the relation of the Vnote-sheet and tracker.

13. In an automatic trackingv device for a perforated note-sheet, the combination of the spool box, a tracker mounted therein, spring arms arranged in the spool box behind the tracker and having their ends projecting j through-the tracker so that the perforated justing the lateral relation between the note-v sheet and controlled by said electro-magnetic means.

et. In an automatic tracking device for a perforated note-sheet, the combination of the spool box, a tracker mounted therein, springarms arranged in the spool boX behind the tracker and having their edges projecting tl'irough the tracker so that the perforated note-sheet can run between the same, contacts arranged in said spool box to cooperate with said spring arms, electro-magnets controlled by said contacts and said spring arms, primary valves controlled by said magnets, secondary valves, and pneulnatics connected to adjust the music spool. I

Intestimony whereof I have hereunto set my hand, in the presence or" two subscribing witnesses.

- LOUIS W. SOUTHGATE.

IVitnesses: I

E. M. ALLEN, C. Fonnns'r Wasson. 

